Which cells have entries that are wrong?

$($a$)$ B$10,$ B$11,$ C$10,$ C$11$

$($b$)$ B$3,$ C$3$

$($c$)$ B$3,$ C$3,$ C$7$

$($d$)$ B$3,$ C$3,$ C$7,$ D$10,$ D$11,$ D$12$